--- /dev/null
+/*
+ * Generic linux-input device driver for keyboard devices
+ *
+ * Copyright (c) 2001 Brian S. Julin
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions, and the following disclaimer,
+ * without modification.
+ * 2. The name of the author may not be used to endorse or promote products
+ * derived from this software without specific prior written permission.
+ *
+ * Alternatively, this software may be distributed under the terms of the
+ * GNU General Public License ("GPL").
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR
+ * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ *
+ * References:
+ * HP-HIL Technical Reference Manual. Hewlett Packard Product No. 45918A
+ *
+ */
+
+#include <linux/hil.h>
+#include <linux/input.h>
+#include <linux/serio.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/slab.h>
+#include <linux/pci_ids.h>
+
+#define PREFIX "HIL KEYB: "
+#define HIL_GENERIC_NAME "HIL keyboard"
+
+MODULE_AUTHOR("Brian S. Julin <bri@calyx.com>");
+MODULE_DESCRIPTION(HIL_GENERIC_NAME " driver");
+MODULE_LICENSE("Dual BSD/GPL");
+
+#define HIL_KBD_MAX_LENGTH 16
+
+#define HIL_KBD_SET1_UPBIT 0x01
+#define HIL_KBD_SET1_SHIFT 1
+static unsigned int hil_kbd_set1[HIL_KEYCODES_SET1_TBLSIZE] =
+ { HIL_KEYCODES_SET1 };
+
+#define HIL_KBD_SET2_UPBIT 0x01
+#define HIL_KBD_SET2_SHIFT 1
+/* Set2 is user defined */
+
+#define HIL_KBD_SET3_UPBIT 0x80
+#define HIL_KBD_SET3_SHIFT 0
+static unsigned int hil_kbd_set3[HIL_KEYCODES_SET3_TBLSIZE] =
+ { HIL_KEYCODES_SET3 };
+
+static char hil_language[][16] = { HIL_LOCALE_MAP };
+
+struct hil_kbd {
+ struct input_dev dev;
+ struct serio *serio;
+
+ /* Input buffer and index for packets from HIL bus. */
+ hil_packet data[HIL_KBD_MAX_LENGTH];
+ int idx4; /* four counts per packet */
+
+ /* Raw device info records from HIL bus, see hil.h for fields. */
+ char idd[HIL_KBD_MAX_LENGTH]; /* DID byte and IDD record */
+ char rsc[HIL_KBD_MAX_LENGTH]; /* RSC record */
+ char exd[HIL_KBD_MAX_LENGTH]; /* EXD record */
+ char rnm[HIL_KBD_MAX_LENGTH + 1]; /* RNM record + NULL term. */
+
+ /* Something to sleep around with. */
+ struct semaphore sem;
+};
+
+/* Process a complete packet after transfer from the HIL */
+static void hil_kbd_process_record(struct hil_kbd *kbd)
+{
+ struct input_dev *dev = &kbd->dev;
+ hil_packet *data = kbd->data;
+ hil_packet p;
+ int idx, i, cnt;
+
+ idx = kbd->idx4/4;
+ p = data[idx - 1];
+
+ if ((p & ~HIL_CMDCT_POL) ==
+ (HIL_ERR_INT | HIL_PKT_CMD | HIL_CMD_POL)) goto report;
+ if ((p & ~HIL_CMDCT_RPL) ==
+ (HIL_ERR_INT | HIL_PKT_CMD | HIL_CMD_RPL)) goto report;
+
+ /* Not a poll response. See if we are loading config records. */
+ switch (p & HIL_PKT_DATA_MASK) {
+ case HIL_CMD_IDD:
+ for (i = 0; i < idx; i++)
+ kbd->idd[i] = kbd->data[i] & HIL_PKT_DATA_MASK;
+ for (; i < HIL_KBD_MAX_LENGTH; i++)
+ kbd->idd[i] = 0;
+ break;
+ case HIL_CMD_RSC:
+ for (i = 0; i < idx; i++)
+ kbd->rsc[i] = kbd->data[i] & HIL_PKT_DATA_MASK;
+ for (; i < HIL_KBD_MAX_LENGTH; i++)
+ kbd->rsc[i] = 0;
+ break;
+ case HIL_CMD_EXD:
+ for (i = 0; i < idx; i++)
+ kbd->exd[i] = kbd->data[i] & HIL_PKT_DATA_MASK;
+ for (; i < HIL_KBD_MAX_LENGTH; i++)
+ kbd->exd[i] = 0;
+ break;
+ case HIL_CMD_RNM:
+ for (i = 0; i < idx; i++)
+ kbd->rnm[i] = kbd->data[i] & HIL_PKT_DATA_MASK;
+ for (; i < HIL_KBD_MAX_LENGTH + 1; i++)
+ kbd->rnm[i] = '\0';
+ break;
+ default:
+ /* These occur when device isn't present */
+ if (p == (HIL_ERR_INT | HIL_PKT_CMD)) break;
+ /* Anything else we'd like to know about. */
+ printk(KERN_WARNING PREFIX "Device sent unknown record %x\n", p);
+ break;
+ }
+ goto out;
+
+ report:
+ cnt = 1;
+ switch (kbd->data[0] & HIL_POL_CHARTYPE_MASK) {
+ case HIL_POL_CHARTYPE_NONE:
+ break;
+ case HIL_POL_CHARTYPE_ASCII:
+ while (cnt < idx - 1)
+ input_report_key(dev, kbd->data[cnt++] & 0x7f, 1);
+ break;
+ case HIL_POL_CHARTYPE_RSVD1:
+ case HIL_POL_CHARTYPE_RSVD2:
+ case HIL_POL_CHARTYPE_BINARY:
+ while (cnt < idx - 1)
+ input_report_key(dev, kbd->data[cnt++], 1);
+ break;
+ case HIL_POL_CHARTYPE_SET1:
+ while (cnt < idx - 1) {
+ unsigned int key;
+ int up;
+ key = kbd->data[cnt++];
+ up = key & HIL_KBD_SET1_UPBIT;
+ key &= (~HIL_KBD_SET1_UPBIT & 0xff);
+ key = hil_kbd_set1[key >> HIL_KBD_SET1_SHIFT];
+ if (key != KEY_RESERVED)
+ input_report_key(dev, key, !up);
+ }
+ break;
+ case HIL_POL_CHARTYPE_SET2:
+ while (cnt < idx - 1) {
+ unsigned int key;
+ int up;
+ key = kbd->data[cnt++];
+ up = key & HIL_KBD_SET2_UPBIT;
+ key &= (~HIL_KBD_SET1_UPBIT & 0xff);
+ key = key >> HIL_KBD_SET2_SHIFT;
+ if (key != KEY_RESERVED)
+ input_report_key(dev, key, !up);
+ }
+ break;
+ case HIL_POL_CHARTYPE_SET3:
+ while (cnt < idx - 1) {
+ unsigned int key;
+ int up;
+ key = kbd->data[cnt++];
+ up = key & HIL_KBD_SET3_UPBIT;
+ key &= (~HIL_KBD_SET1_UPBIT & 0xff);
+ key = hil_kbd_set3[key >> HIL_KBD_SET3_SHIFT];
+ if (key != KEY_RESERVED)
+ input_report_key(dev, key, !up);
+ }
+ break;
+ }
+ out:
+ kbd->idx4 = 0;
+ up(&kbd->sem);
+}
+
+static void hil_kbd_process_err(struct hil_kbd *kbd) {
+ printk(KERN_WARNING PREFIX "errored HIL packet\n");
+ kbd->idx4 = 0;
+ up(&kbd->sem);
+}
+
+static irqreturn_t hil_kbd_interrupt(struct serio *serio,
+ unsigned char data, unsigned int flags, struct pt_regs *regs)
+{
+ struct hil_kbd *kbd;
+ hil_packet packet;
+ int idx;
+
+ kbd = (struct hil_kbd *)serio->private;
+ if (kbd == NULL) {
+ BUG();
+ return IRQ_HANDLED;
+ }
+
+ if (kbd->idx4 >= (HIL_KBD_MAX_LENGTH * sizeof(hil_packet))) {
+ hil_kbd_process_err(kbd);
+ return IRQ_HANDLED;
+ }
+ idx = kbd->idx4/4;
+ if (!(kbd->idx4 % 4)) kbd->data[idx] = 0;
+ packet = kbd->data[idx];
+ packet |= ((hil_packet)data) << ((3 - (kbd->idx4 % 4)) * 8);
+ kbd->data[idx] = packet;
+
+ /* Records of N 4-byte hil_packets must terminate with a command. */
+ if ((++(kbd->idx4)) % 4) return IRQ_HANDLED;
+ if ((packet & 0xffff0000) != HIL_ERR_INT) {
+ hil_kbd_process_err(kbd);
+ return IRQ_HANDLED;
+ }
+ if (packet & HIL_PKT_CMD) hil_kbd_process_record(kbd);
+ return IRQ_HANDLED;
+}
+
+static void hil_kbd_disconnect(struct serio *serio)
+{
+ struct hil_kbd *kbd;
+
+ kbd = (struct hil_kbd *)serio->private;
+ if (kbd == NULL) {
+ BUG();
+ return;
+ }
+
+ input_unregister_device(&kbd->dev);
+ serio_close(serio);
+ kfree(kbd);
+}
+
+static void hil_kbd_connect(struct serio *serio, struct serio_driver *drv)
+{
+ struct hil_kbd *kbd;
+ uint8_t did, *idd;
+ int i;
+
+ if (serio->type != (SERIO_HIL_MLC | SERIO_HIL)) return;
+
+ if (!(kbd = kmalloc(sizeof(struct hil_kbd), GFP_KERNEL))) return;
+ memset(kbd, 0, sizeof(struct hil_kbd));
+
+ if (serio_open(serio, drv)) goto bail0;
+
+ serio->private = kbd;
+ kbd->serio = serio;
+ kbd->dev.private = kbd;
+
+ init_MUTEX_LOCKED(&(kbd->sem));
+
+ /* Get device info. MLC driver supplies devid/status/etc. */
+ serio->write(serio, 0);
+ serio->write(serio, 0);
+ serio->write(serio, HIL_PKT_CMD >> 8);
+ serio->write(serio, HIL_CMD_IDD);
+ down(&(kbd->sem));
+
+ serio->write(serio, 0);
+ serio->write(serio, 0);
+ serio->write(serio, HIL_PKT_CMD >> 8);
+ serio->write(serio, HIL_CMD_RSC);
+ down(&(kbd->sem));
+
+ serio->write(serio, 0);
+ serio->write(serio, 0);
+ serio->write(serio, HIL_PKT_CMD >> 8);
+ serio->write(serio, HIL_CMD_RNM);
+ down(&(kbd->sem));
+
+ serio->write(serio, 0);
+ serio->write(serio, 0);
+ serio->write(serio, HIL_PKT_CMD >> 8);
+ serio->write(serio, HIL_CMD_EXD);
+ down(&(kbd->sem));
+
+ up(&(kbd->sem));
+
+ did = kbd->idd[0];
+ idd = kbd->idd + 1;
+ switch (did & HIL_IDD_DID_TYPE_MASK) {
+ case HIL_IDD_DID_TYPE_KB_INTEGRAL:
+ case HIL_IDD_DID_TYPE_KB_ITF:
+ case HIL_IDD_DID_TYPE_KB_RSVD:
+ case HIL_IDD_DID_TYPE_CHAR:
+ printk(KERN_INFO PREFIX "HIL keyboard found (did = 0x%02x, lang = %s)\n",
+ did, hil_language[did & HIL_IDD_DID_TYPE_KB_LANG_MASK]);
+ break;
+ default:
+ goto bail1;
+ }
+
+ if(HIL_IDD_NUM_BUTTONS(idd) || HIL_IDD_NUM_AXES_PER_SET(*idd)) {
+ printk(KERN_INFO PREFIX "keyboards only, no combo devices supported.\n");
+ goto bail1;
+ }
+
+
+ kbd->dev.evbit[0] = BIT(EV_KEY) | BIT(EV_REP);
+ kbd->dev.ledbit[0] = BIT(LED_NUML) | BIT(LED_CAPSL) | BIT(LED_SCROLLL);
+ kbd->dev.keycodemax = HIL_KEYCODES_SET1_TBLSIZE;
+ kbd->dev.keycodesize = sizeof(hil_kbd_set1[0]);
+ kbd->dev.keycode = hil_kbd_set1;
+ kbd->dev.name = strlen(kbd->rnm) ? kbd->rnm : HIL_GENERIC_NAME;
+ kbd->dev.phys = "hpkbd/input0"; /* XXX */
+
+ kbd->dev.id.bustype = BUS_HIL;
+ kbd->dev.id.vendor = PCI_VENDOR_ID_HP;
+ kbd->dev.id.product = 0x0001; /* TODO: get from kbd->rsc */
+ kbd->dev.id.version = 0x0100; /* TODO: get from kbd->rsc */
+ kbd->dev.dev = &serio->dev;
+
+ for (i = 0; i < 128; i++) {
+ set_bit(hil_kbd_set1[i], kbd->dev.keybit);
+ set_bit(hil_kbd_set3[i], kbd->dev.keybit);
+ }
+ clear_bit(0, kbd->dev.keybit);
+
+ input_register_device(&kbd->dev);
+ printk(KERN_INFO "input: %s, ID: %d\n",
+ kbd->dev.name, did);
+
+ serio->write(serio, 0);
+ serio->write(serio, 0);
+ serio->write(serio, HIL_PKT_CMD >> 8);
+ serio->write(serio, HIL_CMD_EK1); /* Enable Keyswitch Autorepeat 1 */
+ down(&(kbd->sem));
+ up(&(kbd->sem));
+
+ return;
+ bail1:
+ serio_close(serio);
+ bail0:
+ kfree(kbd);
+}
+
+
+struct serio_driver hil_kbd_serio_drv = {
+ .driver = {
+ .name = "hil_kbd",
+ },
+ .description = "HP HIL keyboard driver",
+ .connect = hil_kbd_connect,
+ .disconnect = hil_kbd_disconnect,
+ .interrupt = hil_kbd_interrupt
+};
+
+static int __init hil_kbd_init(void)
+{
+ serio_register_driver(&hil_kbd_serio_drv);
+ return 0;
+}
+
+static void __exit hil_kbd_exit(void)
+{
+ serio_unregister_driver(&hil_kbd_serio_drv);
+}
+
+module_init(hil_kbd_init);
+module_exit(hil_kbd_exit);
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